The present invention relates to a portable shelter assembly. The assembly includes a support; and an expandable shelter for being supported by the support and expanding to shelter at least one person. The shelter includes ribs extending from the support. Each rib includes one or more proximal elements pivotally mounted to the support. Each rib further includes a distal element extending from the proximal elements and configured to move outwardly to expand the shelter when the proximal elements pivot in a first direction. Advantageously, the distal elements may be simply pulled down one at a time to lift the connected proximal elements and extend the ribs, which is advantageous in windy conditions, or pulled down together to lift the proximal elements and extend the ribs.